Study On Removing Kitchen Cooking Oil Fume And Design A New Fume Purifier

We use catalysts in removing the kitchen cooking fumes before it came into the atmosphere .During this process, we try to reduce the volatile organic compounds (VOCs) , the particulate matter (PM) and other pollutants. It is a very useful gas purification method. The current techniques are divided into physical and chemical. The physical methods are mainly by mechanical separation,filtration , absorption, washing and electrostatic law.The chemical methods commonly use thermal oxidation and catalytic combustion. We commonly use a catalyst for platinum, palladium and rhodium combination. By use of such precious metals as the main catalyst components ,we can purify the volatile organic compounds (VOCs) and the particulate matter (PM), and other pollutants at the same time. However, precious metals are expensive, their resources are very limited, for these reasons, the use of precious metal as catalyst is not realistic.China is rich in Rare Earth ,the reserves of rare earth are the first in the world.It has greater potential that Rare Earth may reduce the precious metal catalyst or even completely replace the precious metal in such areas. Our experimental group aimed at developing a kin of new catalyst for kitchen fume processor.The paper adopted a scientific catalytic activity evaluation system for laboratory operations.the system includes the preparation of standard oil,the system of forming cooking fume,the system of cleaning cooking fume,the system of collecting cooking fume, the measurement system and so on.The La_0.8Sr_0.2MnO₃ catalyst with various loading were prepared at 800℃and examined at 150℃, 200℃, 250℃, 300℃and 350℃by impregnation method. The results showed that:the loading of 20% was the best. With the same loading of 15%,four kinds of La_0.8Sr_0.2MnO₃ were prepared at 600℃, 700℃, 800℃and 900℃and examined at 300℃.The results showed that:the catalyst which were prepared at 800℃had the highest catalytic activity.The La_0.8Sr_0.2MnO₃ catalysts were studied by means of XRD and SEM.The XRD showed that the catalyst has generated significant perovskite at 700℃; At 800℃,the structure of perovskite was more better than 700℃.With the insulation brick as the carrier, We designed a new fume purifier. the insulation brick has a high porosity,more extensive source of raw materials and low price.So it has a good practical value and prospect.The La_0.8Sr_0.2MnO₃ catalyst can be used effectively to removing (VOCs) of the cooking fume more than 90%,So The La_0.8Sr_0.2MnO₃ catalyst is very good for cleaning the cooking fumes.